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http://dx.doi.org/10.5909/JEB.2012.17.2.344

Super-resolution Algorithm using Discrete Wavelet Transform for Single-image  

Lim, Jong-Myeong (Kwangwoon University)
Yoo, Ji-Sang (Kwangwoon University)
Publication Information
Journal of Broadcast Engineering / v.17, no.2, 2012 , pp. 344-353 More about this Journal
Abstract
In this paper, we propose a super-resolution algorithm using discrete wavelet transform. In general super-resolution algorithms for single-image, probability based operations have been used for searching high-frequency components. Consequently, the complexity of the algorithm causes the increase of processing time. In the proposed algorithm, we use discrete wavelet transform to find high-frequency sub-bands. We perform inverse discrete wavelet transform using input image and high-frequency sub-bands of the same resolution as the input image which are obtained by performing discrete wavelet transform without down-sampling and then we obtain image with high-resolution. In the proposed algorithm, we use the down-sampled version of the original image ($512{\times}512$) as a test image ($256{\times}256$) to compare the performance of algorithms. Through experimental results, we confirm the improved efficiency of the proposed algorithm comparing with conventional interpolation algorithms and also decreased processing time comparing the probability based operations.
Keywords
super-resolution; wavelet transform;
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Times Cited By KSCI : 2  (Citation Analysis)
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